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California voters will decide in a November special election whether to approve a redrawn congressional map designed to help Democrats win five more U.S. House seats next year.

Lawmakers voted mostly along party lines Thursday to approve legislation calling for the special election, and Democratic Gov. Gavin Newsom, who has led the campaign in favor of the map, quickly signed it.

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Republicans, who have filed a lawsuit and called for a federal investigation into the plan, promised to keep fighting to stop it.

The legislation is a response by Democrats seeking to neutralize Texas Republicans’ push to adopt a new congressional map favoring the GOP at the urging of President Donald Trump

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